Charged incorrect price

I bought 500g Pronutro on 12/01 -advertised at R24.99. While unpacking shopping at home, i noticed I was charged R26.99. I emailed the store on13/01 to complain about this -no response. On 19/01 I forwarded that email to [Email Removed] address on the Spar website, asking them to attend to the problem. I received a response from Winnie Mthembu, customer care assistant asking me to contact the store directly. I was astonished- seemed like she did not take the time to read and understand the entire email. So i emailed back a curt response asking her to direct me to someone who is willing and able to assist me. That was at 12h20 on 19/01. I have had no response since. I am astounded - first i am ****** i.e. overcharged, then the store does not bother to monitor its mailbox or reply to queries and then the Customer care at Spar Head office is absolutely pathetic! Is this how a paying customer can expect to be treated? why do the stores even have e-mail addresses if those mailboxes are not monitored? Why does Spar have one address on its website, which goes to some Customer care person who is an imbecile. This is totally unacceptable.